Google base pretty much acts like Craigs list but is set up in an adsense manner and you do not need a website to get your items listed and searchable.

Google Base is a free Google service ( Still in Beta) that helps you publish virtually any kind of information -- be it your latest riveting screenplay or a listing for your slightly dented 1989 Honda Accord -- on Google Base or other Google properties.

You can also create your own data feeds and control panel to get more exposure of your products or services.

Google Base allows you to list up to One Million Items and the only requirement is that you have a Google account. There is just way to much information to list and I have only listed a few.

So far I have only placed four of my high traffic websites on Google Base and the ads will stay up for thirty days and then I can renew them if I choose to do so. I will renew them since right now the service is free and is giving me more exposure for my websites.

For more information go to their website at
Google Base Help

P.S. 154 impressions and and 1 sale so far for the first 30 days and the best part is the traffic is free!